Characterization of Combined Sewer Overflows from a Small Urban Watershed and Determination of Optimum Detention Volume

소규모 도시유역 합류식 하수관거 월류수 특성화 및 최적 저류지 용량 결정

  • Jo, Deokjun (Department of Civil Engineering, Dongseo University) ;
  • Kim, Geonha (Department of Civil and Environmental Engineering, Hannam University)
  • 조덕준 (동서대학교 토목공학과) ;
  • 김건하 (한남대학교 토목환경공학과)
  • Received : 2005.10.27
  • Accepted : 2006.02.01
  • Published : 2006.03.30

Abstract

Diffuse pollution from an urban area contributes to the significant pollution loading to a receiving water body. In this paper, rainfall runoffs from an urban basin with combined sewer systems located in the city of Daejeon were monitored to measure the rainfall runoff discharge rates and pollutant concentrations. Strong first flush effects were observed for all monitored rainfall runoffs. The first flush effects were closely related to rainfall intensity, while suspended solids were closely related to pollutant constituents. The observed averaged Event Mean Concentrations (EMCs) of Combined Sewer Overflows (CSOs) were 536.1 mg SS/L, 467.7 mg CODcr/L, 142.7 mg BOD/L, 16.5 mg TN/L, and 13.5 mg TP/L. Storage volumes for containing the first flush to improve water quality of the receiving stream can be estimated based on suspended solid concentration. In this study, retainment of the first flush equivalent to 5mm of precipitation could reduce diffuse pollution loading induced by CSOs to a receiving water body by up to 80% of suspended solid loading.

Acknowledgement

Supported by : 수자원

References

  1. 대전광역시, 대전광역시 하수도정비 기본계획 변경보고서 (1999)
  2. 최성현, 최승철, 김병욱, 임재명, 강우시 합류식 하수관거 월류수 차집용량 산정을 위한 유출특성 분석, 상하수도학회지 논문, 16(3), pp. 320-330 (2004)
  3. SPSS ver. 12.0K, User's Manual, SPSS Inc
  4. Driscoll, E. D., Palhegyi, G. E., Strecker, E. W. and Shelley, P. E., Analysis of Storm Events Characteristics for Selected Rainfall Gauges Throughout the United States, U.S. Environmental Protection Agency, Washington, D.C. (1989)
  5. 환경부, 하수도 시설기준 (1998)
  6. APHA, Standard Methods for the Examination of Water and Wastewater. 18th edition, Washington (1992)
  7. Novotny, Y., Integrating Diffuse/nonpoint Pollution Control and Water Body Restoration into Watershed Management, Journal of the American Water Resources Association, 35(4), pp. 717-727 (1999) https://doi.org/10.1111/j.1752-1688.1999.tb04169.x
  8. 여중현, 김건하, 도시 소유역에서 하수관거 월류수의 배출특성 연구, 대한토목학회논문집, 25(1B), pp. 254-261 (2005)
  9. 최의소, ,상하수도공학, 청문각, p. 190 (1999)
  10. 윤현식, 합류식 하수관거 월류수의 오염물질 특성과 처리, 박사학위논문, 한양대학교 (1998)
  11. 이종각, 방기웅, 이준호, 합류식하수관의 오염물질 유출특성에 관한 연구, 대한환경공학회지, 대한환경공학회, 18(10), pp. 1147-1160 (1996)
  12. Park, H., Hyun, l. H. and Park, C. H., Needs and Options of Korea for Integrated Water Management, Journal of Water Services Research and Technology-Aqua. 47(2), pp. 57-67 (1998) https://doi.org/10.1046/j.1365-2087.1998.00083.x
  13. U.S. EPA Urban Runoff Pollution Prevention and Control Planning, EPA/625/R-93/004 (1993)
  14. 박노연, CSOs(합류식 하수관거 월류수) 처리시설의 현황, 대한토목학회지, 대한토목학회, 51(2) , pp. 47-54 (2003)
  15. 이두진, 신웅배, 강우유출 모델을 이용한 합류식 하수관거 월류수 저류시설의 용량결정에 관한 연구(I), 대한환경공학회지, 26(3), pp. 362-369 (2004)
  16. 대전광역시, 도심생태하천조성 학술연구 (2003).
  17. 한영만, 도시유출모형을 이용한 도시화 유역의 유출해석, 한남대학교 대학원 토목환경공학과 석사학위논문 (2001)
  18. Lape, J. and Dwyer, T. .J., Controlling combined Sewer Overjlows(CSOs) EPA's CSO Control Policy. in Proceeding of the 1994 WERF, Kemtucky Tenn., pp. 0-18 (1994)
  19. 환경부, 2001 하수도 통계 (2002)